// 模板字符串
// const str = `hello es2015, this is a \`string\``
// console.log(str)

// 换行
// const str = `hello es2015,

// this is a string` 
// console.log(str)

// 插值表达式

const name = 'tom'
const msg = `hey, ${name} --- ${1+2}`
console.log(msg)